The original post made a few suggestions for the answer, including:

Real Time Arranging ??
Band in a Box for linux ??
A Working BBPlugin (EZBBvst) ??
Other ??

But I think Rustyspoon's posts, the second in this thread and the one just above, give answers I can agree with. Any of these other specific suggestions, the ones in the OP's post or different, deserve separate threads.

In my opinion, the Forum is quieter because of two possibilities: 1) BIAB can do what most users need to do, and/or 2) an increasing number of more advanced users who post frequently have grown weary waiting for fixes. Quite a few years ago now, I suggested there be 'no new features' in favor of a year in which existing features and limitations were fixed (but continue with new RealTracks so there is something new to sell). As the years go by, I continue to believe this is the approach that is needed, once. Then add new features to a solid core, although these need to be thought through very carefully or we get back into the same cycle.

Nothing I've written means that I do not love and appreciate BIAB. I use it every day.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.